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Title |
Vibration Reduction Effect and Structural Behavior Analysis for Column Member Reinforced with Vibration Non-transmissible Material
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Authors |
김진호(Jin-Ho Kim) ; 이나현(Na-Hyun Yi) ; 허진호(Jin-Ho Hur) ; 김희규(Hee-Kyu Kim) |
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DOI |
http://dx.doi.org/10.11112/jksmi.2016.20.4.094 |
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Keywords |
Elevated railway station ; Structural vibration ; Vibration non-transmissible system ; Impact hammer test ; Structural performance test |
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Abstract |
For elevated railway station on which track is connected with superstructure of station, structural vibration level and structure-borne-noise level has exceeded the reference level due to structural characteristics which transmits vibration directly. Therefore, existing elevated railway station is in need of economical and effective vibration reduction method which enable train service without interruption. In this study, structural vibration non-transmissible system which is applied to vibroisolating material for column member is developed to reduce vibration. That system is cut covering material of the column section using water-jet method and is installed with vibroisolating material on cut section. To verify vibration reduction effect and structural performance for structural vibration non-transmissible system, impact hammer test and cyclic lateral load test are performed for 1/4 scale test specimens. It is observed that natural period which means vibration response characteristics is shifted , and damping ratio is increased about 15~30% which means that system is effective to reduce structural vibration through vibration test. Also load-displacement relation and stiffness change rate of the columns are examined, and it is shown that ductility and energy dissipation capacity is increased. From test results, it is found that vibration non-transmissible system which is applied to column member enable to maintains structural function.
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